5 Answers
5

You'll have to add the .inc extension to MMDocumentTypes.xml. You haven't indicated what version of Dreamweaver you're using, or your operating system, so I'll have to guess Windows is your OS from your other questions.

In CS5, you can't have duplicates of your entry in the XML (if the extension is already assigned to another file type, so check/remove any duplicate you don't want otherwise there will be an errors when starting Dreamweaver. In addition, you also can't save a backup XML in the folder using the same name (like "MMDocumentTypes_BU.xml"). Dreamweaver will try and read both files, you will get errors having duplication extensions entered.